Sandro Ferraz
type: MusicGroup
genre: samba
popularity: 4
followers: 108
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x11f9cfc3a7b28d93f54320d90897164edc15cb4e37503b7fe3e10fd422e33865
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4c295f70-42d8-4e9f-98a9-35c019f49e84.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4c295f70-42d8-4e9f-98a9-35c019f49e84.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4c295f70-42d8-4e9f-98a9-35c019f49e84
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x11f9cfc3a7b28d93f54320d90897164edc15cb4e37503b7fe3e10fd422e33865","name":"Sandro Ferraz","registered_at":"2026-06-16T16:03:59Z","symbol":"NIM1103498","token_address":"0x66b9285850821f5145f143998797e42bbdc895c3","type":"artist","uuid":"4c295f70-42d8-4e9f-98a9-35c019f49e84"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f9cfc3a7b28d93f54320d90897164edc15cb4e37503b7fe3e10fd422e33865. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c295f70-42d8-4e9f-98a9-35c019f49e84.json and https://artists.proofprofile.net/proofs/artist/4c295f70-42d8-4e9f-98a9-35c019f49e84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x11f9cfc3a7b28d93f54320d90897164edc15cb4e37503b7fe3e10fd422e33865","name":"Sandro Ferraz","registered_at":"2026-06-16T16:03:59Z","symbol":"NIM1103498","token_address":"0x66b9285850821f5145f143998797e42bbdc895c3","type":"artist","uuid":"4c295f70-42d8-4e9f-98a9-35c019f49e84"}
album: Bambas da Orgia 80 Anos Meu Amor De Bamba
  type: MusicAlbum
  date published: 2025-01-13
album: A Cura Que Vem da Terra (União da Tinga 2025)
  type: MusicAlbum
  date published: 2025-01-30
  track: A Cura Que Vem da Terra (União da Tinga 2025)
    type: MusicRecording
    duration: PT4M51S
    duration ms: 291279
    explicit: false
    by artist: Sandro Ferraz
    in album: A Cura Que Vem da Terra (União da Tinga 2025)
      type: MusicAlbum
      date published: 2025-01-30
    genre: samba
    isrc code: TCAJH2538207
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T15:28:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x88ff7da93ecb79371c211e12de294237c549d29d1ac23b9d148872ad89e2d3f3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958905
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958905
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJH2538207
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T16:14:34Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ff7da93ecb79371c211e12de294237c549d29d1ac23b9d148872ad89e2d3f3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJH2538207.
      date published: 2026-07-20T16:14:34Z
    audio: A Cura Que Vem da Terra (União da Tinga 2025)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 141.463
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.383
      additional property: Energy
        type: PropertyValue
        value: 0.738
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0.196
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.188
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.777
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.861
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major